var gridRenderer = {
    maskPassword : function(v)
    {
        if(!v) return v;
        return '&#9679;'.repeat(v.length);
    }
    , createComboRenderer : function(propertyName)
	{
		return function(val){
			if(this.editor.store.getById(val))
				return this.editor.store.getById(val).data[propertyName];
			else
				return val;
		}
	}
}